Windshield wiper



. June 24, 1930. H. scHRoDER WINDSHIELD WI PER Filed Sept. '7, 1927 y INVENTOR.

' Patented June 2 4, 1930Av i HoWARn sCHRoDER, oF v0.55111.nien.; ce Insomnia WINDSHIELD Wires. f'

Applieation filed september 7, i927. semaine 217,906.

The invention forming the subject Vmatter of this application relates Vto an improvement in Windshield Wipers, and it consists in the combination, constructionand arrange# ments hereinafter described and claimed.

i. rotation of a "double threaded *screw shaft .Windshield vWiper back and forth across the ceeds.

. accompanying drawing Which forms Ythereto Vand surrounding the same.. -Anelecn Y tric motor 3 isisecured ltoone side -vof-the` The rprincipal object of vmy in ventionis to provide a Windshield Wiper' in Whichthe Will causey thewiper Vto move across the vWind` shield and which will also cause the WiperA .to be returned on saidV shaft tothe Astarting position thereof.

Another'obj ect of the invention is to provide a deviceof the type Vdescribed in which novel ymeans is` provided for movingL the front ofthe Windshield Without" necessitating the reversing of the driving means thereof.. rj

The above andfother objects in view vWill more readily appear as the specification pro- Although I show and describe the preferred embodiment ofmy invention'7 it is to be understood that'changes as to theform', design, parts and arrangementr thereof may be made by personsskilled in the art Without departing from the spirit of or sacricing any of the advantages of the invention.' f

lMy invention is clearly illustrated inV the Y `part of this specification and in` which,

Figure l is a f ront'elevation of the mechanismof my deviceas applied toaWindshield, the cover of the device beingremoved, Figure 2 is afsectionalvievv along'the line 2 2 of Figure l, and

Figure 3 is a'sectional detaillvievvlof the securing means of my. Windshield wiper to the operating mechanism'. Y

In carrying outmy invention, I make use of a Windshield l having a` frame 2 adjacent frame member 2 so that thedriving shaft' 4 thereof extends through the horizontal portion yof said frame member 2'i`nto a housing 5 attached'tothe oppositey sideof the horizon-4 talrmem'ber of saidframe'2.' f A Worm' Wheel A6 is secured tothe end ofthedriving shaft 4L Vandrotated rod-7 rotatably.

supported `in the bearings disposed at the'- oppositelends thereof in the housing 5. A' Worm9 ycutadjacent toan end o f'th'e rod is soy disposed-'asto be' engaged bythe Worm Wheel Gand rotated thereby. i A An 'intermediate portion of the 1 0 ,ar-icl. a right hand thread '-11 cutthereon so thatlsaidleft hand'.v and right handthrea'ds are; the vcontinuation of each other at-the starting and the vend vpoint thereof.,` thus. formingan endless thread as sh'oWnrinv/Figure; l. t Aftraveler 12is disposedon-*the threaded'. portion of rod 7, having' a pin '13 f extending therein so as to engage the groove' of said endless thread'.

A lug 14 is ,depending fromy the traveler l12 and eXtendsoutside of thehousing 5L slot l5' is provided inthe bottom o fvth'er wa-tis double-threaded, having. aileft hand thread.

de. es;

housing v5.,so asf to permit themovement of'` i the lug ltalongside the Windshield.`

, A.,vviper arm 16` carriesV the .Windshield I Wiper 41.7;l Saidwiper may be maderof rubber.

or the like,v andis -helzl firmly between the' bent'` edges: of lthe Wiperarm 16. Ther end of-,the Windshield vviper arm 'adjacent tothe 1 lug-14isffdovetail shaped-YasatflS and is' L slided vinto the corresponding lslot 19,4 dis.`

posedvin theloWer end of the depending flug 14. Athumbscrew 2O is employed-tofrmlv secure;therwindshield depending'V lug f lj/l.

Wviper" `the ..1 In order toprovidemeans'for lubricationr theropgnngs 21.1are disposed attthetop por tion offtheghousing, adjacent and oppositer 'tofthe threaded portionsof therod .1 The-Windshield wiping ydevice. operatesf'as s* follows: .y `1.Looking:at'Iigure 2 andV assumingthat the .rod 7 is .rotated inv a' clockwise .direction bythe motor 3 andbythe Worm Wheeli it so :that they traveler 12 Will'moveA avvay from thewormgi). The 'depending lugY 14 moves with the traveler l2 in the groove l5 carrythe pini A13 gtraversedfthe `full length''of thefi isjreadhily seen thatlrthe pin 13 engagesthe.` Y. y left hand thread lOandfisnadvanced'thereby i 1 9.5; Y'

./-g f Y 1,765,808

' left hand thread l0 vand reached the end l 'thereof the Windshield Wiper and the vlug 1 2 are inthepostion shown in dotted lines. f At,V this pointthe pin vvll momentarily stop 5 at the end of the left hand thread 10V but as Y the motor 3 rotates the-'rod 7 continuously in clockwise `direction the pin 13 is forced `to .Y Vcontinue to travel inthe'grooveof the right hand'thread 11. Said rightV hand thread V11 10 guides the pin`13 and the traveler l2 'back to theoriginal positionwvhere the'pin'as-` suines the startngposition thereofatthev K end oftheV right hand threadll 'and at Vthe" i beginning ofthe left hand thread 10. is. 15 evident that as long' as the rod 7gis 4rotated the traveler V12 Will travel .back and forth l to thelfullI lengthrofthethreaded portion Y' of the rodV 7, thereby carrying the Windl' shield Wiper back and forth,'andfcleaningV im the-Vvvindshield continuouslyuntil theinotor Y 3y is stopped. Y Thel rnotor 3 is`fan. electrical f YYmotorofanyconvenient sizean'd is'conn'ect-l V` Aedito a=battery`and tocircuitlbrea'kerto Y 5 Ycontrol the electric circuit thereof.l As any Y Y g3 convenient type of battery orswitchf maybe f i .f usedin .connection with thefinotor 3 they were not showninfthe drawing?` I Y.

Thesimplicity of the deficeA isself evil 'dent the removal I on the Windshield Wiper 30" may be readily effected by simply loosening p the thurnb Vscrevv--20fs`o as to permit the re# Yinoval ofthe Windshield Wiper'arin l6. l Having 'thus describ'edtriny invention, Y What IY-now claim as novel fand desire to se- Y 'isf cure by Letters Patent Vis Y 7 Y Y v Y .v Y or v Y- `j drive mechanisinlfor a WindshieldV wip-v 1 r i Y 1 i er,` comprising ascreW shaft having van endl 'i I Y f less ,right and leftV screw :thread rotatably lsupported alongside the' voutsideface of a A41j''Windshieldl housing of substantiallyfrecf tangularV cross section securedto the outside 'Y `face of the Windshield and surrounding Vsaid Y screw shaft; a traveler. ofrectangular crossv `A *Y Y Y V y v Y y j section slidab'lefinside of thefhousing and 5 Y Y Y Y Y, 1 'Y 431 on `saicle'screvvY shaft; 'a lug for carrying i Y 1 Y i Windshield Wiper, depending Yfror'n said i f trzwelerrg/jsaid;travelerprojectingdown- Y WardlyathrougheaV longitudinalslotiformedV f f Y `infthje base ofsaidfhousing'and correspondopi-ng" in length'tothe strolefofsaidtravelem f `-pinf'fixed'ly 'secured linisai'd Ytrweler and extending intol the grooves iofjtheV Vscrew" Y Y sliaftso asfto. be Along-itudinal-ly` advancedfl bythe rotation of thescrevv shaft,V whereby x tleitraveler is reciprocated `in said housing; Y

Lf; means Yfor rotating said screw'shaft; and toil y cups'on the outside ofthe housing Vdpposite Y y Y j; Q said' 'screvv'shaftfandVsaiddriving*means'ffor lubricating saidscrevvsha'ft j60 'Init'esti'i'nony Wher'eof'l afix my'si'gnature':

'74,.,'HOWAJRD:SCHRODEHfY i' 

